Self closing coupling

ABSTRACT

A valve arrangement for dispensing liquid from a flexible container ( 124 ) containing a dispenser body ( 106 ) connected to a flexible container ( 124 ) for containing a liquid and a first biasing means ( 168 ) adapted to bias a first closing member ( 110 ) to close off a first passage ( 107 ) in the container dispenser body ( 106 ); and a valve body ( 118 ) with a second biasing means ( 120 ) adapted to bias a second closing member ( 116, 118 ) to close off a second passage ( 119 ) defined in the valve body ( 118 ); and a dispensing member ( 122 ) operatively connected to the valve body ( 118 ); and operating means ( 114, 198, 136 ) which moves the two bodies ( 118, 106 ) into an operative position, against the two biasing means ( 168, 120 ) to open the two passages ( 107, 119 ) allowing liquid to flow from the flexible container ( 124 ) along the first passage ( 107 ) and out of the second passage ( 119 ).

FIELD OF INVENTION

The present invention relates to a valve arrangement for dispensingliquids, in particularly beverages.

BACKGROUND TO INVENTION

When large quantities of beverages and liquid extracts are sold to bars,cinema houses, etc., it is often desirable to sell these in a form tosave space and transport costs. The beverage or extract thus iscontained in a flexible container such as a flexible pouch of plasticsmaterial.

When required, the user couples the flexible container to an existingdispensing member or system, which is fixed in position, and dispensesthe beverage or extract for consumption or prior mixing with anotherbeveral or liquid prior to consumption.

From time to time it is necessary to replace the flexible containerscontaining the beverages or extracts when used up. It is thereforenecessary to disconnect the flexible container from the dispensingmember or system. The connection of the flexible container to thedispensing member or system is by means of a valve arrangement. Thisvalve arrangement should be simple in construction and inexpensive tomake. It should not leak or drip and must not permit ingress of air intothe flexible container or into the dispensing member or system.Furthermore, once the flexible container has been connected to thedispensing member or system, the valve arrangement should be easilyopened to allow flow of the beverage or liquid extract.

It is an object of the present invention to provide a valve arrangement,which meets the conditions set out above more successfully than otherknown valve arrangements.

SUMMARY OF INVENTION

According to the invention, a valve arrangement for dispensing liquidfrom a flexible container, is characterized thereby that it includes

a first set of components including:

-   -   a) a container dispenser body adapted to be connected on a        container side to a flexible container for containing a liquid        and on a dispenser side opposite to the container side to a        second set of components;    -   b) a first passage defined in the container dispenser body        having an inlet opening on its container side and an outlet        opening on its dispenser side;    -   c) a first closing member adapted to close off the first passage        between its outlet opening and the its opening;    -   d) first biasing means adapted in a position of rest to bias the        first closing member to close off the first passage;        and a second set of components including:    -   e) a valve body adapted to be operatively connected to the        container dispenser body;    -   f) a second passage defined in the valve body and having an        inlet opening on its side to face the container dispenser body        when connected to its dispenser side and an outlet opening        opposite to the inlet opening;    -   g) a second closing member adapted to close off the second        passage between its inlet opening and its outlet opening;    -   h) second biasing means adapted in a position of rest to bias        the second closing member to close off the second passage;    -   i) a dispensing member operatively connected to the valve body;        and    -   j) operating means adapted to move the valve body and the        container dispenser body relatively together from their        respective positions of rest into an operative position in which        the first passage and the second passage are opened against the        action of their respective biasing means for allowing liquid to        flow along the first passage from the flexible container into        the second passage and out of the second passage.

The operating means may include guiding means for rotatably guiding anut associated with the valve body along at least one spiral grooveprovided externally on the container body.

The guiding means may include at least one spiral groove providedexternally on the container body and associated protrusion(s) providedinternally in the nut.

The first closing member may include a stem associated with the firstbiasing means in the form of a diaphragm body, the diaphragm body beingadapted to close off the first passage between its inlet opening and itsoutlet opening.

The second closing member may include a valve body adapted to close offthe second passage between its inlet opening and its outlet opening.

The second biasing means may include a coil spring adapted to actbetween the dispensing member and the valve body for biasing the valvebody relatively towards the container dispenser body during its positionof rest.

The arrangement may be made of suitable plastics material, e.g. byinjection moulding.

Also according to the invention, a flexible container for liquid with acontainer valve arrangement for dispensing liquid, is characterizedthereby that it includes

-   -   a first set of components including:    -   a) a container dispenser body connected on a container side to        the flexible container and on an dispenser side being adapted to        be connected opposite to the container side to a second set of        components;    -   b) a first passage defined in the container dispenser body        having an inlet opening on its container side and an outlet        opening on its dispenser side;    -   c) a first closing member adapted to close off the first passage        between its outlet opening and its inlet opening; and    -   d) first biasing means adapted in a position of rest to bias the        first closing member to close off the first passage.

Further according to the invention, a dispensing arrangement fordispensing liquid from a flexible container, characterized thereby thatit includes a second set of components including:

-   -   a) a valve body adapted to be operatively connected to a        container dispenser body;    -   b) a second passage defined in the valve body and having an        inlet opening on its side to face the container dispenser body        when connected to its dispenser side and an outlet opening        opposite to the inlet opening;    -   c) a second closing member adapted to close off the second        passage between its inlet opening and its outlet opening;    -   d) second biasing means adapted in a position of rest to bias        the second closing member to close off the second passage        between its inlet opening and its outlet opening;    -   e) a dispensing member operatively connected to the valve body;        and    -   f) operating means adapted to move the valve body and the        container dispenser body relatively together from their        respective position of rest into an operative position in which        the first passage in a container dispenser body to which it is        connected and the second passage are opened against the action        of their respective biasing means for allowing liquid to flow        from the first passage into the second passage and out of the        second passage.

BRIEF DESCRIPTION OF DRAWINGS

The invention will now be described by way of example with reference tothe accompanying schematic drawings.

In the drawings there is shown in:

FIG. 1: a sectional side view of a valve arrangement in accordance withthe invention prior to assembly;

FIG. 2: a view corresponding to FIG. 1 but showing the assembled valvearrangement in the closed position or position of rest;

FIG. 3: a view corresponding to FIG. 2 but showing the assembled valvearrangement in the open position;

FIG. 4: a pictorial view of the container dispenser body of the valvearrangement illustrated in FIGS. 1 to 3;

FIG. 5: an outside view of the container dispenser body shown in FIG. 4;

FIG. 6: a view of the container dispenser body corresponding to FIG. 5but turned through 90°;

FIG. 7: a sectional side view of the container dispenser body seen alongarrows VII—VII in FIG. 5;

FIG. 8: an enlarged detail indicated by arrow VIII in FIG. 7;

FIG. 9: an enlarged detail indicated by arrow IX in FIG. 6;

FIG. 10: an end view of the container dispenser body seen along arrow Xin FIG. 5;

FIG. 11: an end view of the container dispenser body seen along arrow XIin FIG. 5;

FIG. 12: an enlarged detail indicated by arrow XII in FIG. 7;

FIG. 13: a pictorial view of the valve stopper of the valve arrangementillustrated in FIGS. 1 to 3;

FIG. 14: an end view of the valve stopper seen along arrow XIV in FIG.13;

FIG. 15: a side view of the valve stopper seen along arrow XV in FIG.14;

FIG. 16: a sectional side view of the valve stopper seen along arrowsXVI—XVI in FIG. 15;

FIG. 17: an enlarged detail indicated by arrow XVII in FIG. 16;

FIG. 18: a pictorial view of the diaphram body of the valve arrangementillustrated in FIGS. 1 to 3;

FIG. 19: a side view of the diaphram body shown in FIG. 18;

FIG. 20: an end view of the diaphram body seen along arrow XX in FIG.19;

FIG. 21: a sectional side view of the diaphram body seen along arrowXXI—XXI in FIG. 19;

FIG. 22: an enlarged detail indicated by arrow XXII in FIG. 21;

FIG. 23: a pictorial view of the pilfer-proof closure cap of the valvearrangement illustrated in FIGS. 1 to 3;

FIG. 24: a pictorial view of the closure cap of FIG. 23 seen from theopposite side;

FIG. 25: a side view of the closure cap seen along arrow XXV in FIG. 23;

FIG. 26: an end view of the closure cap seen along arrow XXVI in FIG.25;

FIG. 27: a sectional side view of the closure cap seen along arrowsXXVII—XXVII in FIG. 26;

FIG. 28: a sectional side of the closure cap seen along arrowsXXVIII—XXVIII in FIG. 26;

FIG. 29: an enlarged detail indicated by arrow XXIX in FIG. 27;

FIG. 30: an enlarged detail indicated by arrow XXX in FIG. 28;

FIG. 31: an enlarged detail indicated by arrow XXXI in FIG. 29:

FIG. 32: a pictorial view of the operating nut of the valve arrangementillustrated in FIGS. 1 to 3;

FIG. 33: a side view of the operating nut seen along arrow XXXIII inFIG. 32;

FIG. 34: an end view of the operating nut seen along arrow XXXIV in FIG.33;

FIG. 35: a sectional side view of the operating nut seen along arrowsXXXV—XXXV in FIG. 34;

FIG. 36: a sectional side view of the operating nut seen along arrowsXXXVI—XXVI in FIG. 34;

FIG. 37: a pictorial view of the second valve body of the valvearrangement illustrated in FIGS. 1 to 3;

FIG. 38: a side view of the second valve body seen along arrow XXXVIIIin FIG. 37;

FIG. 39: an end view of the second valve body seen along arrow XXXIX inFIG. 38;

FIG. 40: a pictorial view of the first valve body of the valvearrangement illustrated in FIGS. 1 to 3;

FIG. 41: a pictorial view of the first valve body shown in FIG. 40 butseen from the opposite side;

FIG. 42: an end view of the first valve body seen along arrow XLII inFIG. 40;

FIG. 43: an opposite end view of the first valve body seen along arrowXLIII in FIG. 41;

FIG. 44: a side view of the valve body seen along arrow XLIV in FIG. 42;

FIG. 45: a sectional side view of the first valve body seen along arrowsXLV—XLV in FIG. 44;

FIG. 46: on an enlarged scale a detail indicated by arrow XLVI in FIG.45;

FIG. 47: a pictorial view of a dispenser fitting of a valve arrangementillustrated in FIGS. 1 to 3;

FIG. 48: a side view of the dispenser fitting seen along arrow XLVIII inFIG. 47;

FIG. 49: a view of the dispenser fitting seen along arrow XLIX in FIG.48; and

FIG. 50: a view of the dispenser fitting seen along arrow L in FIG. 48.

DETAILED DESCRIPTION OF DRAWINGS

Referring to FIGS. 1 to 3, a valve arrangement in accordance with theinvention, generally indicated by reference numeral 100, is shown.

The valve arrangement 100 includes a first set of components indicatedby reference numeral 102 and a second set of associated componentsindicated by reference numeral 104. The first set of components 102 areadapted to be attached to a pouch or flexible container containing abeverage, e.g. wine, or a liquid extract, e.g. for making a soft drink.

The second set of components 104 are located at a dispensing location,e.g. in a bar or restaurant, a factory, an office or in domesticpremises.

The first set of components 102 include a container dispenser body 106having an internal passage 107, a valve stopper 108, and a diaphram body110.

Prior to use, the first components 102 are closed off by means of aclosure cap 112.

The second set of components 104 include an operating nut 114, a firstvalve body 116, a second valve body 118 having an internal passage 119,a stainless steel coil spring 120 and a dispenser fitting 122.

FIG. 2 shows the assembled valve arrangement with the first set ofcomponents attached to a flexible container or bag 124 and with theclosure cap 112 removed so that the second set of components 104 can befitted to the first set of components. In this position the valvearrangement 100 is in the closed position and no liquid can flow fromthe flexible container 124 through the passages 107 and 119 to thedispenser fitting 122.

In FIG. 3 the operating nut 114 has been rotated so as to cause thevalve arrangement 100 to open and to allow flow of the beverage from theflexible container 124 through the valve arrangement and along thedispenser fitting 122 for dispensing purposes.

The operation of the valve arrangement 100 will be described in moredetail after the description of the various components as set out below.

Referring to FIGS. 4 to 12 the container dispenser body 106 isillustrated.

The body 106 has a first tubular part 126 and a second tubular part 128between which a disc 130 is provided. The first tubular part 106 isadapted to be inserted through a gland 131 in a flexible container 124.

The second part 128 therefore protrudes to the outside of the gland 131of the flexible container 124.

The first part 106 is provided at its open end 132 with a scallop typeof formation so as to prevent the open end to be closed off by anopposite part of a flexible container 124 as it reaches its empty stageand collapses under atmospheric pressure.

On the outside of the first part 126 a number of rings 134 are provided.These rings 134 are tightly and sealingly fitted to the gland 131provided in a flexible container 124.

The second part 128 has two opposite spiral grooves 136 which extendfrom the open end 138 of the second part 128 up to adjacent the disc130. At the disc 130 the spiral groove 136 extends into a straight part140 and a step 142 is provided between the part 140 and the spiralgroove 136.

At the end 138 an annular ridge 144 is provided. On its inside thesecond part 128 is provided with an inwardly directed collar 146 fromwhich there extends an annular ring 148. The annular ring 148 terminatesin an inclined step formation 150 as shown in FIG. 8.

On the inside a step 151 is provided adjacent the collar 146 directed tothe open end 132 of the first part 126.

An annular ridge 152 is provided in the first part 126.

The valve stopper 108 is illustrated in FIGS. 13 to 17.

The valve stopper 108 has an annular ring 154 with a central hub 156which is joined to the annular ring 154 by means of radial arms 158defining spaces 159 between them. Between the ring 154 and the hub 156an intermediate ring 160 is provided. Flow can take place through thespaces 159.

A stem 162 extends from the hub 156. As can be seen from FIGS. 13 and 14the stem 162 is flattened on one side 164.

Furthermore, as indicated in FIG. 17 a raised section 166 is providedadjacent the annular ring 154.

The diaphram body 110 is illustrated in FIGS. 18 to 22. The diaphrambody 110 includes a cup 168 from which a stem 170 extends. At its endthe stem 170 is provided with a frusto-conical formation 172. The stem170 includes a hollow cylindrical passage 174.

The annular end 176 of the cup 168 is provided with a thickened annularring portion 178 as shown in FIG. 22.

At the beginning of the passage 174 a thickened annular section 180 isprovided as shown in FIGS. 19 and 21.

The closure cap 112 is illustrated in FIGS. 23 to 31.

The closure cap 112 includes a disc 182 attached by way of a tearablesection 184 to a ring 186. A gripping tab 188 is joined to the ring 186.

The cap 112 is fitted to the outside of the annular body 106 as shown inFIG. 1.

In FIGS. 32 to FIGS. 35 the operating nut 114 is illustrated.

The operating nut 114 includes a cylindrical body 190 on the outside ofwhich a number of longitudinal recesses 192 and ridges 194 are providedfor gripping purposes.

The body 190 is slightly tapered as is in particular clear from FIGS.32, 33 and 35.

At its one open end 196 the operating nut 114 has two opposite knobs 198which co-operate with the spiral grooves 136 of the container dispenserbody 106 shown in FIGS. 4 to 7.

At its opposite end 200 the nut 114 has an inwardly directed collar 202which is divided into two parts by way of two opposite cut-outs 204.

The second valve body 118 is illustrated in FIGS. 37 to 39. The secondvalve body 118 has a cylindrical part 206 having an inwardly directedcollar 208 at an inlet opening 210 of the passage 119, the collar 208passing over into an internal ring 212. The ring 212 has a bent-overpart 214 with an annular seat 216.

On the inside surface 218 of the ring 206 a number of concentric rings220 are provided at the outlet opening 221 opposite the inlet opening210.

The first valve body 116 is illustrated in FIGS. 40 to 46. The firstvalve body 116 includes an annular ring 222, which has on its inside acup-shaped formation 224. Centrally the cup-shape formation 224 has astem part 226 having a recess 228 at one end.

The cup-shaped formation 224 is supported by radial arms 230 defininggaps 231 between them. Flow can take place through the gaps 231.

An annular ridge 232 is provided on the cup-shaped part 224 concentricto the stem 226.

In FIGS. 47 to 50 the dispenser fitting 122 is shown. The dispenserfitting 122 has a first tubular part 234 joined to a second tubular part236 having an increased diameter and, which in turn terminates in athird tubular part 238 with an even larger diameter.

The tubular part 238 is provided with a ring 240 on its outer surfaceand carries an annular outwardly directed collar 242, which has twoopposite flattened surfaces 244.

The part 238 has an internal passage 246 leading into a passage 248which further leads into a passage 250 in the part 234. From the part234 a spigot 252 extends with engagement rings 254 on the outside and adisc 256 close to the part 234. The passage 250 is in communication witha further passage 258 in the spigot 252.

In use, the first set of components 102 are attached to a flexiblecontainer 124 in that the container dispenser body 106 is tightly andsealingly fitted by way of the rings 134 to the gland 131 fixed to theflexible container 124. The flexible container 124 is filled with abeverage or liquid extract. The beverage (or extract) cannot flow outthrough the dispenser body 106 because the cup 168 of the diaphragm body110 abuts sealingly against the inwardly directed collar 146 of thesecond part 128.

Similarly the second set of components 104 joined to a dispenser member(e.g. a tap—not shown) connected to the dispenser fitting 122 is closedoff and no backflow can take place. This is achieved in that the spring120 presses the first valve body 116 so that the annular ridge 232 abutssealingly against the annular seat 216. This is also the position ofrest when the operating nut 114 is uncoupled from the second part 128).

When the operating nut 114 is coupled to the second part 128 the closedposition is as illustrated in FIG. 2. However, on rotating the nut 114through 90° in that the knobs 198 slide in the grooves 136, the stem 170presses the first valve body 116 against the biasing action of thespring 120 (as shown in FIG. 3) so that the annular ridge 232 is movedaway from the seat 216 to open an annular gap 260 and simultaneously thecup 168 of the diaphragm body 116 is pushed together so that it liftsoff the collar 146 to provided an annular gap 262 through which beveragecan flow from the flexible container 124 through the passages 107 and119 to be dispensed by way of the dispenser spigot 252 whereverrequired.

Reference Numerals

-   100 valve arrangement or valve-   102 first set of components-   104 second set of associated components-   106 container dispenser body-   107 internal passage-   108 valve stopper-   110 diaphram body-   112 closure cap-   114 operating nut-   116 first valve body-   118 second valve body-   119 internal passage-   120 stainless steel coil spring-   122 dispenser fitting-   124 flexible container or pouch-   126 first tubular part-   128 second tubular part-   130 disc-   131 gland-   132 open end-   134 rings-   136 spiral groove-   138 open end of the second part-   140 straight part-   142 step-   144 annular ridge-   146 inwardly directed collar-   148 annular ring-   150 curved formation-   151 step-   152 annular ring-   154 annular ring-   156 central hub-   158 radial arms-   159 spaces-   160 intermediate ring-   162 stem-   164 flattened side of stem-   166 raised section-   168 cup-   162 stem-   172 frosto-conical formation-   174 passage-   176 annular end-   178 thickened annular ring portion-   180 thickened annular section-   182 disc-   184 tearable section-   186 ring-   188 gripping tab-   190 cylindrical body-   192 longitudinal recesses-   194 longitudinal ridges-   196 open end-   198 two opposite knobs-   200 opposite end-   202 inwardly directed collar-   204 two opposite cut-outs-   206 cylindrical part-   208 collar-   210 inlet opening-   212 internal ring-   214 bent-over part-   216 annular seat-   218 inside surface of ring-   220 concentric rings-   222 annular ring-   224 cup-shaped formation-   226 stem-   228 recess-   230 radial arms-   231 gaps-   232 annular ridge-   234 first tubular part-   236 second tubular part-   238 third tubular part-   240 ring-   242 annular outwardly directed collar-   244 flattened surface-   246 passage-   248 passage-   250 passage-   252 spigot-   254 engagement rings-   256 disc-   258 passage-   260 annular gap-   262 annular gap

1. A valve arrangement for dispensing liquid from a flexible container(124), characterized thereby that it includes a) a container dispenserbody (106) adapted to be connected to a flexible container (124) forcontaining a liquid; b) a passage (107) defined in the containerdispenser body (106) having an inlet opening (132) and an outlet opening(138); c) a closing member (110) centrally, movably located in thecontainer dispenser body (106) and being adapted to close off thepassage (107) between its outlet opening (138) and its inlet opening(132); d) biasing means (168) integrally formed with the closing member(110) and being adapted in a position of rest to bias the closing member(110) to close off the passage (107); and e) a stem (162) adapted toguide and limit movement of the closing member (110) so that saidclosing member (110) is movable relative to said stem (162).
 2. A valvearrangement as claimed in claim 1, characterized thereby that theclosing member (110) and biasing means (168) are formed by a diaphragmbody.
 3. A valve arrangement as claimed in claim 1, characterizedthereby that the closiong member (110) is adapted to be pushed together.4. A valve arrangement as claimed in claim 1, characterized thereby thatthe closing member (110) is substantially conically shaped.
 5. A valvearrangement as claimed in claim 1, characterized thereby that a passage(174) is provided in the closing member (110).
 6. A valve arrangement asclaimed in claim 5, characterized thereby that the passage (174) iscylindrical in shape.
 7. A valve arrangement as claimed in claim 1,characterized thereby that the closing member (110) is slidably locatedon the stem (162).
 8. A valve arrangement as claimed in claim 5,characterized thereby that the stem (162) is slidably provided withinthe passage (174).
 9. A valve arrangement as claimed in claim 1,characterized thereby that the stem (162) is located in the containerdispenser body (106) so that it is located between the closing member(110) and the inlet opening (132).
 10. A valve arrangement as claimed inclaim 1, characterized thereby that the stem (162) is provided withspaces (159) through which a fluid may pass during use.
 11. A valvearrangement as claimed in claim 1, characterized thereby that it is madeof suitable plastics material.
 12. A valve arrangement as claimed inclaim 11, characterized thereby that it is manufactured by injectionmoulding.
 13. A valve arrangement for dispensing liquid from a flexiblecontainer (124), characterized thereby that it includes a) a valve body(118); b) a passage (119) defined in the valve body (118) and having aninlet opening (210) and an outlet opening (221) opposite to the inletopening (210); c) a closing member (116, 118) adapted to close off thepassage (119) between its inlet opening (210) and its outlet opening(221); d) biasing means (120) adapted in a position of rest to bias theclosing member (116, 118) to close off the passage (119); and e) anannular ridge (232) integrally formed with the closing member (116,118), the annular ridge (232) being adapted to be in slidingcircumferential contact with an annular seat (216) of the valve body(118).
 14. A valve arrangement for dispensing liquid from a flexiblecontainer (124), characterized thereby that it includes a first set ofcomponents (102) including: a) a container dispenser body (106) adaptedto be connected on a container side to a flexible container (124) forcontaining a liquid and on a dispenser side opposite to the containerside to a second set of components (104); b) a first passage (107)defined in the container dispenser body (106) having an inlet opening(132) on its container side and an outlet opening (138) on its dispenserside; c) a first closing member (110) centrally, movably located in thecontainer dispenser body (106) and being adapted to close off the firstpassage (107) between its outlet opening (138) and its inlet opening(132); d) first biasing means (168) integrally formed with the closingmember (110) and being adapted in a position of rest to bias the firstclosing member (110) to close off the first passage (107); e) a stem(162) adapted to guide and limit movement of the closing member (110);and a second set of components (104) including: a) a valve body (118)adapted to be operatively connected to the container dispenser body(106); b) a second passage (119) defined in the valve body (118) andhaving an inlet opening (210) on its side to face the containerdispenser body (106) when connected to its dispenser side and an outletopening (221) opposite to the inlet opening (210); c) a second closingmember (116, 118) adapted to close off the second passage (119) betweenits inlet opening (210) and its outlet opening (221); d) second biasingmeans (120) adapted in a position of rest to bias the second closingmember (116,118) to close off the second passage (119); and e) anannular ridge (232) integrally formed with the closing member (116,118), the annular ridge (232) being adapted to be in slidingcircumferential contact with an annular seat (216) of the valve body(118).
 15. A valve arrangement as claimed in claim 14, characterizedthereby that it includes operating means (114, 198, 136) adapted to movethe valve body (118) and the container dispenser body (106) relativelytogether from their respective positions of rest into an operativeposition in which the first passage (107) and the second passage (119)are opened against the action of their respective biasing means (168,120) for allowing liquid to flow along the first passage (107) from theflexible container (124) into the second passage (119) and out of thesecond passage (119).
 16. A valve arrangement as claimed in claim 15,characterized thereby that the operating means (114, 198, 136) includesguiding means (198, 136) for rotatably guiding a nut (114) associatedwith the valve body (118) along at least one spiral groove (136)provided externally on the container body (106).
 17. A valve arrangementas claimed in claim 16, characterized thereby that the guiding means(198, 136) includes at least one spiral groove (136) provided externallyon the container body (106) and associated protrusion(s) (198) providedinternally in the nut (114).
 18. A valve arrangement as claimed in claim14, characterized thereby that the first closing member (110) includes astem (162) associated with the first biasing means in the form of adiaphragm body (168), the diaphragm body (168) being adapted to closeoff the first passage (107) between its inlet opening (132) and itsoutlet opening (138).
 19. A valve arrangement as claimed in claim 14,characterized thereby that the second closing member (116, 118) includesa valve body (116) adapted to close off the second passage (119) betweenits inlet opening (210) and its outlet opening (221).
 20. A valvearrangement as claimed in claim 14, characterized thereby that thesecond biasing means includes a coil spring (120) adapted to act betweenthe dispensing member (122) and the valve body (116) for biasing thevalve body (116) relatively towards the container dispenser body (106)during its position of rest.
 21. A valve arrangement as claimed in claim14, characterized thereby that it is made of suitable plastics material.22. A valve arrangement as claimed in claim 21, characterized therebythat it is manufactured by injection moulding.